Fire-grate.



J. H. & A. N. SPANGELO.

FIRE-GRATE.

APPLICATION FILED JAN. 21, 1909.

Patented Mans, 1910.

aauyle mvirn srarns grater critics,

JAMES H. SPANGELO AND ALBERT N. SPANGELO, OF CONCRETE, NORTH DAKOTA.

FIRE-GBATE.

To all whom it may concern:

Be it known that we, JAMES H. SPANGELO and ALBERT N. Srxxcnno, citizensof the United States, residing at Concrete, in the county of Pembina andState of North Dakota, have invented certain new and useful Improvementsin Fire-Grates; and we do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which -it appertains to make and use the same.

This invention relates to improved fire grates, especially adapted forstraw and wood burning engines.

The invention consists in the construction and arrangement of parts aswill be hereinafter described and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 represents a top plan view of afire box with this improved grate applied; Fig. 2 represents atransverse vertical section thereof taken on the line 22 of Fig. 1; andFig. 3 represents an end elevation showing the nipples for connecting itto the boiler.

In the embodiment illustrated, a grate 1, is shown composed of tubulargrate bars, as 2, preferably screw threaded at their opposite ends andconnected at one end by U- shaped couplings or elbows and nipples, as 3,and two of the pipes or tubes opposite the door of the fire box areconnected by a plurality of integral T-couplings 4t and 5 connectedtogether by a union 9 and provided with removable plugs 6 and 7 toprovide for the cleaning out of the tubes, when necessary. These bars,as 2, are supported within the box in any suitable manner, preferably bycurved brackets, as 8, attached to the boiler plate, and the outer barsof the grate are connected with the boiler plate by nipples 9, each ofwhich is provided with a nut 9, for the purpose. Pipes 2, which extendbeyond one end of the plate are also secured to the nipples and saidpipes 2 serve to support the tubular bars 2, and their inner ends inrecesses 10, at the other end of the frame.

This grate is readily attachable to the fire box of any wood or strawburning engine Specification of Letters Patent.

Application filed January 21, 1909.

Patented Mar. 8, 1910.

Serial No. 473,427.

or boiler, and the length of the grate and the number of tubes isregulated by the size of the fire box, and the tubing may be made of anydesired size.

The grate, herein described, provides for the use of the heat generatedby the burning of the fuel thereupon, as an additional heating surfacefor the water in the boiler, as the nipples 9, by which the grating isattached to the boiler plates on each side of the fire box, ashereinbefore described, tap the water area of the boiler and cause aconstant circulation of water through the tubular grate bars, andthereby increase the heating capacity of the fire box, and utilize theheat heretofore wasted by contact of the fire with a solid grating,converting it into an additional steam producing surface. The constantcirculation of water in the tubular grating, also prevents burning ofthe grating and the consequent sagging thereof. Clinkers caused by theburning of weeds and straw upon the grating are also prevented.

The tubular bars may be run'either crosswise or longitudinally throughthe fire box, as described, and thefire box may be tapped at any desiredpoint to attach the grate.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

lVe claim as our invention:

A fire grate of the character described comprising a rectangular framewith curved brackets at one end and having recesses at its other end,tubular grate bars arranged in pairs and having at their outer ends U-shaped couplings, the forward ends of one bar of each pair next to thesides of the frame having nipples secured thereto, said nipples alsohaving supplementary pipes secured thereto which extend outwardly beyondthe front end of the frame, means on said nipples for securing said barsand said intermediate pipes thereto, the inner bars of said grate, eachhaving on their forward ends a T-shaped coupling which are securedtogether by a short pipe, and detachable means on the outer encls ofsaid 'l"-couplings, set our hands in presence of two subscribing saldU-sl1apecl couphngs and lntermedlate W1tnesses.

pipes bein cletachably connected to said brackets and said recesses,whereby all of i,

' the grate bars can be readily removed from a the frame Withoutobstruction, substantially Witnesses: as SPEClfiGCl. GEORGE T.SONSTERUD,

In testimony whereof We have hereunto l T. H. FIKKEN.

